An iceberg breaks off from a glacier on the shore of the ocean with a loud cracking sound. the air. A person on a ship hears the sound in the water 4.0 s before hearing the sound in the air. How far away is the ship? The ambient temperature is –5.0°C. The speed of sound in saltwater is 1 530 m/s
a. 5 700 m
b. 1 700 m
c. 1 100 m
d. 380 m
b
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Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result:
A. both spheres are neutral B. both spheres are positive C. both spheres are negative D. L is negative and M is positive E. L is positive and M is negative
Two ways that the temperature of a gas can be increased are by __________ and __________
Fill in the blank(s) with correct word
Liquid crystal displays make use of __________
Fill in the blank(s) with correct word
A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 28.8% and that of C is 14.2%, what is the percentage by mass of O?
a. 16.0% b. 57.0% c. 43.0% d. 22.5% e. None of the above